Initial import

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Ana(r)chronofile parser.
+#
+# Copyright (C) 2021 Silvio Rhatto <rhatto@riseup.net>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published
+# by the Free Software Foundation, either version 3 of the License,
+# or any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Dependencies
+import os
+import yaml
+import argparse
+from pprint import pprint
+
+class AnarChronofile:
+    def __init__(self, args):
+        if not os.path.exists(args.file[0]):
+            raise FileNotFoundError('File not found: ' + args.file[0])
+
+        if os.path.isfile(args.file[0]):
+            self.args = args
+            self.file = open(args.file[0], '+r')
+            self.yaml = yaml.load(self.file)
+
+    def run(self):
+        if getattr(self, 'args', None) is None:
+            return
+
+        print(self.args)
+        print("---")
+        print("")
+
+        if self.args.topic is not None:
+            topic = self.args.topic
+
+            for item in self.yaml:
+                if topic in item:
+                    if self.args.subtopic is not None:
+                        subtopic = self.args.subtopic
+
+                        if subtopic in item[topic]:
+                            print('Date: ' + str(item['date']))
+                            print("\n")
+                            pprint(item[topic][subtopic])
+                            print("\n")
+
+                    else:
+                        print('Date: ' + str(item['date']))
+                        print("\n")
+                        pprint(item[topic])
+                        print("\n")
+
+        else:
+            pprint(self.yaml)
+
+def cmdline():
+    """
+    Evalutate the command line.
+
+    :return: Command line arguments.
+    """
+
+    basename = os.path.basename(__file__)
+    examples = "Examples:\n\t" + basename + " incoming.yaml\n"
+    epilog   = examples
+    parser   = argparse.ArgumentParser(description='Parse an ana(r)chronofile',
+                                       epilog=epilog,
+                                       formatter_class=argparse.RawDescriptionHelpFormatter,)
+
+    parser.add_argument('file',     nargs=1,   help='YAML file')
+    parser.add_argument('topic',    nargs='?', help='Topic to search')
+    parser.add_argument('subtopic', nargs='?', help='Subtopic to search')
+
+    # Get args
+    args = parser.parse_args()
+
+    return args
+
+if __name__ == "__main__":
+    args = cmdline()
+
+    try:
+        parser = AnarChronofile(args)
+        parser.run()
+    except (FileNotFoundError, KeyboardInterrupt) as e:
+        print(e)
+        exit(1)